Petroleum coke (petcoke) is an inexpensive potential fuel. However, its use has been limited because of the low volatile content and high sulfur contents. Moreover, research work has been extended for reducing the sulfur contents in petcoke. However, there is still no commercially established process of desulfurization of petcoke. Studies have been extended on the desulfurization of two petcoke samples. Interesting results were obtained by employing the techniques such as organorefining; that is, solvent extraction using N-methyl-2-pyrrolidone containing small amounts of ethylenediamine, morpholine, ethylenediamine, and other solvents. Acids and alkalis were also used for the desulfurization of petcoke. Biodesulfurization using Pantoea agglomerans D23W3 and Acidithiobacillus ferrooxidans showed interesting results. The present work also resulted in the development of some integrated processes of desulfurization of petcoke.
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